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3D digital outcrop model reconstruction of the Kimberley outcrop (Gale crater, Mars) and its integration into Virtual Reality for simulated geological analysis
Le Mouélic, Stéphane; Mangold, Nicolas; Le Deit, Laetitia +3 more
Structure-from-Motion photogrammetry has recently become a cheap and efficient method to reconstruct accurate and highly-resolved 3D Digital Outcrop Model (DOM) from a single set of images. This enables the 3D visualization of hardly accessible and/or remote geological scenes, which is of strong interest for planetary bodies. This paper focuses on…
A Comparison of UV and Optical Metallicities in Star-forming Galaxies
Kewley, Lisa J.; Acharyya, Ayan; Rigby, Jane R. +4 more
Our ability to study the properties of the interstellar medium in the earliest galaxies will rely on emission-line diagnostics at rest-frame ultraviolet (UV) wavelengths. In this work, we identify metallicity-sensitive diagnostics using UV emission lines. We compare UV-derived metallicities with standard, well-established optical metallicities usi…
Panchromatic properties of the extreme Fe II emitter PHL 1092
Marziani, Paola; Rodríguez-Ardila, Alberto; Marinello, Murilo +2 more
We present near-infrared spectroscopy of the NLS1 galaxy PHL 1092 (z = 0.394), the strongest Fe II emitter ever reported, combined with optical and UV data. We modelled the continuum and the broad emission lines using a power-law plus a blackbody function and Lorentzian functions, respectively. The strength of the Fe II emission was estimated usin…
MCSED: A Flexible Spectral Energy Distribution Fitting Code and Its Application to z ∼ 2 Emission-line Galaxies
Schneider, Donald P.; Gronwall, Caryl; Ciardullo, Robin +7 more
We present MCSED, a new spectral energy distribution (SED) fitting code that mates flexible stellar evolution calculations with the Markov Chain Monte Carlo algorithms of the software package emcee. It takes broad-, intermediate-, and narrowband photometry, emission-line fluxes, and/or absorption-line spectral indices and returns probability distr…
Resolved Lyman-α properties of a luminous Lyman-break galaxy in a large ionized bubble at z = 6.53
Sobral, David; Cantalupo, Sebastiano; Darvish, Behnam +5 more
The observed properties of the Lyman-α (Ly α) emission line are a powerful probe of neutral gas in and around galaxies. We present spatially resolved Ly α spectroscopy with VLT/MUSE targeting VR7, a UV-luminous galaxy at z = 6.532 with moderate Ly α equivalent width (EW0 ≈ 38 Å). These data are combined with deep resolved [CII]158&…
Detailed Iron-peak Element Abundances in Three Very Metal-poor Stars
Roederer, Ian U.; Sneden, Christopher; Cowan, John J. +4 more
We have obtained new detailed abundances of the Fe-group elements Sc through Zn (Z = 21-30) in three very metal-poor ([Fe/H] ≈ -3) stars: BD+03o740, BD-13o3442, and CD-33o1173. High-resolution ultraviolet Hubble Space Telescope/Space Telescope Imaging Spectrograph spectra in the wavelength range 2300-3050 Å were ga…
Temperature and chemical species distributions in the middle atmosphere observed during Titan's late northern spring to early summer
Seignovert, B.; Teanby, N. A.; Flasar, F. M. +12 more
We present a study of the seasonal evolution of Titan's thermal field and distributions of haze, C2H2, C2H4, C2H6, CH3C2H, C3H8, C4H2, C6H6, HCN, and HC3N from March 2015 (Ls
Long-term Orbital Evolution of Galactic Satellites and the Effects on Their Star Formation Histories
Chiba, Masashi; Miyoshi, Takahiro
We investigate the orbital motions of dwarf spheroidal galaxies (dSphs) in the halo of the Milky Way (MW) to understand their possible effects on the diversity of the star formation histories seen in these MW satellites. In this work, we explicitly consider a time-varying gravitational potential due to the growth of the MW's dark halo mass to calc…
The GALAH survey: temporal chemical enrichment of the galactic disc
Lewis, Geraint F.; Ting, Yuan-Sen; Casey, Andrew R. +22 more
We present isochrone ages and initial bulk metallicities ([Fe/H]_{bulk}, by accounting for diffusion) of 163 722 stars from the GALAH Data Release 2, mainly composed of main-sequence turn-off stars and subgiants (7000 K> T_{ eff}> 4000 K and log g>3 dex). The local age-metallicity relationship (AMR) is nearly flat but with significant sca…
IRAM 30-m-EMIR redshift search of z = 3-4 lensed dusty starbursts selected from the HerBS sample
Pérez-Fournon, I.; Ivison, R. J.; Clements, D. L. +15 more
Using the Eight MIxer Receiver (EMIR) instrument on the Institut de RadioAstronomie Millimétrique (IRAM) 30-m telescope, we conducted a spectroscopic redshift search of seven zphot ∼ 4 submillimetre bright galaxies selected from the Herschel Bright Sources sample with fluxes at 500 µm greater than 80 mJy. For four sources, we obta…